"Soft Paraffin Wax BP" (the original poster's recommendation) is a "white translucent jelly" that is used as a base (for delivering drugs) in ointments. ('BP' stands for 'British Pharmacopoeia'.) The paraffin used in canning is a solid at room temperature whereas 'soft paraffin waxy' is a 'jelly' at room temperature (melting temp. is <0 degrees C.).
More on "Soft Paraffin Wax BP" can be found here:
Palo Alto, Calif.